Exploració per tema "Microwaves"

Ara es mostren els items 21-40 de 162

    • Caracterización de transistores de microondas mediante la técnica de calibración TRL 

      Pradell i Cara, Lluís; Artal, Eduardo; Comerón Tejero, Adolfo; Corbella Sanahuja, Ignasi; Sabater, C. (1989)
      Text en actes de congrés
      Accés obert
      In this paper, the design of a Microstrip Test Fixture for TRL calibration is described. Experimental results for S-parameters measurement of a GaAs FET chip in the 3-22 GHz frequency range are presented. Repeatability of ...

    • CI de microondas. Tecnologías 

      Artal, Eduardo; Comerón Tejero, Adolfo; Corbella Sanahuja, Ignasi (1988-09)
      Article
      Accés restringit per política de l'editorial
      Los circuitos integrados monolíticos de microondas presentan ventajas potenciales respecto de los circuitos híbridos habituales en cuanto a fiabilidad, reducido tamaño y peso, banda ancha y bajo coste. Se describe el estado ...

    • Cohn's filters with parallel-coupled transmission lines and no discontinuities 

      Mariño Acebal, José Bernardo; de los Reyes, Elías; Masgrau Gómez, Enrique José (Warsaw University of Technology, 1980)
      Text en actes de congrés
      Accés obert
      A new method for designing Cohn's parallel-coupled transmission-line filters is introduced. This method is particularly well suited to obtain designs without discontinuities in the junction of the different transmission ...

    • Compact and Simple X 3 (9 to 27 GHz) Pll Frequency Multiplier Using Harmonic Phase Detection 

      Berenguer Sau, Jordi; Comerón Tejero, Adolfo (1987)
      Text en actes de congrés
      Accés obert
      Frequency multiplication in the microwave and millimeter-wave range can be performed in compact form using harmonic phase detectors, in which the veo phase is directly compared to a multiple of the reference frequency ...

    • Comparison of lossy filters and predistorted filters using novel software 

      Padilla Díaz, Alberto; Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Ernst, Cristoph; Rius Casals, Juan Manuel; Tamayo Palau, José María; O'Callaghan Castellà, Juan Manuel (IEEE Microwave Theory and Techniques Society, 2010)
      Comunicació de congrés
      Accés obert

    • Comprehensive circuit model of auto-limiting superconductor devices and systems 

      Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Hueltes Escobar, Alberto; O'Callaghan Castellà, Juan Manuel; García Pastor, David; Perea Robles, Rafael; Joshi, N.; Lu, X.; Orloff, Nathan D.; Booth, James C. (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This paper presents a phenomenological equivalent circuit to model the phenomenon occurring when a section of superconducting transmission line transits from a superconducting state to a normal state. This phenomenon allows ...

    • Comprehensive nonlinear characterization and modeling of a BAW duplexer 

      Collado Gómez, Juan Carlos; Mateu Mateu, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This paper performs a comprehensive nonlinear modeling of a Bulk Acoustic Wave (BAW) duplexer operating at the band 7 of the LTE wireless communication standard. The modeling starts by an accurate characterization of the ...

    • Condiciones de existencia de modos de orden superior en estructuras planares 

      Cardama Aznar, Ángel (1980)
      Text en actes de congrés
      Accés obert
      Conditions for existence of higher-order modes of the reduced wave equation V2 u + Au = 0 on semi - infinite domains subjected to different boundary conditions are presented and applied to the slot line. Bounds for the ...

    • Conmutador de microondas con transistor MESFET encapsulado 

      Comerón Tejero, Adolfo; Elias Fusté, Antoni (1985)
      Text en actes de congrés
      Accés obert
      A packaged GaAs MESFET has been used to implement a fast switch at frequencies around 12 GHz. The insertion loss in the ON state is approximately 2 dB between 9 and 13 GHz. In the OFF state the insertion loss can be higher ...

    • Cylindrical geometry: a further step in active microwave tomography 

      Broquetas Ibars, Antoni; Jofre Roca, Lluís; Cardama Aznar, Ángel; Elias Fusté, Antoni; Rius Casals, Juan Manuel; Romeu Robert, Jordi (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1991-05-01)
      Article
      Accés obert
      A prototype imaging system for active microwave tomography using cylindrical geometry has been developed, making it possible to obtain images of the dielectric properties of biological targets at 2.45 GHz. This configuration ...

    • Cylindrical microwave imaging system 

      Soneira Ferrando, M. José; Jofre Roca, Lluís; Broquetas Ibars, Antoni (1988)
      Text en actes de congrés
      Accés obert
      A cylindrical system for microwave tomography working at 2.45 GHz has been presented. In this setup, the body, immersed in water, is illuminated with a cylindrical wave and the measured scattered fields are processed by ...

    • DARFM - Impedance, transformers and tapers 

      Torres Torres, Francisco; Pradell i Cara, Lluís (2010-03-01)
      Report de recerca
      Accés obert

    • DARFM - Introduction to narrow-band matching networks 

      Torres Torres, Francisco; Pradell i Cara, Lluís; Miranda, Jorge (2010-03-01)
      Report de recerca
      Accés obert

    • Deployment mechanism for an L-Band Helix antenna on-board the 3Cat-4 1U CubeSat 

      Fernandez Capon, Lara Pilar; Sobrino Hidalgo, Marco; Milian, Oriol; Aguilella Merelas, Andrea; Solanellas Bofarull, Arnau; Badia Ballús, Marc; Muñoz Martin, Joan Francesc; Ruiz De Azúa Ortega, Juan Adrián; Sureda Anfres, Miquel; Camps Carmona, Adriano José (Universitat Politècnica de Catalunya, 2022-04-29)
      Comunicació de congrés
      Accés obert
      Earth Observation (EO) is key for climate and environmental monitoring at global level, and in specific regions where the effects of global warming are more noticeable, such as in polar regions, where ice melt is also ...

    • Desenvolupament d'un sistema de control per assaigs de Compatibilitat Electromagnètica: Immunitat radiada i conduïda 

      Solé Lloveras, Jordi (Universitat Politècnica de Catalunya, 2020-05)
      Treball Final de Grau
      Accés obert
      Each electronic device with commercial purposes within the European Union shall declare the EMC normative compliance. One the requirements consists on assuring that the device continues operating as intended when electromagnetic ...

    • Desenvolupament de BALUNS multimodals basats en tes coplanars 

      Queralt Jarne, Martí (Universitat Politècnica de Catalunya, 2016)
      Projecte/Treball Final de Carrera
      Accés obert

    • Design a MIMO solution for 4G applications with Virtual Antenna™ Technology 

      Oliva, Marc (Universitat Politècnica de Catalunya, 2018-07)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      With the antenna provided by the company, design a MIMO solution for 4G applications in a platform with similar dimensions of current mobile phones.

    • Design and development of high-performance C-band circuits for CIMR (Copernicus Imaging Microwave Radiometer) ESA space mission 

      Fernandez Jardí, Oscar (Universitat Politècnica de Catalunya, 2022-07-14)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   SENER
      The Arctic is region where deep changes are occurring which have direct repercussions on our weather and climate. CIMR, that stands for Copernicus Imaging Microwave Radiometer, is a mission that will carry a wide-swath ...

    • Design and optimization of Photonic Systems for Microwave Applications 

      Nuño Gómez, Daniel-Juan (Universitat Politècnica de Catalunya, 2017-09-07)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Institut de Ciències Fotòniques (ICFO) / Universitat de Barcelona / Universitat Autònoma de Barcelona
      Extensively researched in the last years, the Microwave Photonics Technology field has a number of potential advantages including extremely wide bandwidth, very low frequency constant losses, light weight, immunity to EMI ...

    • Design of a leaky-wave antenna based on Goubau line for imaging applications 

      Bock Filella, Roger (Universitat Politècnica de Catalunya, 2022-07-05)
      Treball Final de Grau
      Accés obert
      En ingeniería de antenas, uno de los aspectos más apreciados es la capacidad de apuntar el haz principal electrónicamente. Una de las técnicas más ampliamente usadas para conseguirlo es el escaneo mediante agrupaciones de ...